Several ad hoc tables, crosstabs, charts often form a collection of related reports. These aren't typically well suited to a dashboard (nor laid out well) but should be viewed together. A collection is more easily scheduled and delivered - one schedule vs. multiple schedules + emails/files.
This saves on multiple files, one for each table, crosstab and/or chart.
|Components||JasperReports Server, AdHoc, ReportViewer|